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Flashcards in C2 Deck (19)
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1

State the Sine Rule

a/SinA=b/SinB=c/SinC
or
SinA/a=SinB/b=SinC/c

2

State the Cosine Rule

a²=b²+c²-2bccosA
b²=a²+c²-2accosB
c²=a²+b²-2abcosC

3

State the cosine rule for angles

CosA=(b²+c²-a²)/2bc

4

How to work out the area of a triangle

1/2absinC

5

State the log to exponential rule

logaN=x
n^x=n

6

State the log laws

logaxy=logax+logay
logax/y=logax-logay
logx^k=klogx

7

What is the area of a sector

A=1/2r²x

8

What is the area of a segment

A=1/2r²(x-sinx)

9

What is the length of an arc

L=rx

10

What is 1 radian equal to

180/pi

11

How do you write the equation of a circle with centre (a,b) radius r

(x-a)²+(y-b)²=r²

12

How to change the base of logs

logax=logbx/logba

13

What is the midpoint of (x1,y1) and (x2,y2)

(x1+x2/2,y1+y2/2)

14

What is the distance between (x1,y1) and (x2,y2)

√((x1,y1)+(x2,y2))

15

What is the nth term of a Geometric question

ar^n–1

16

What is the sum of a finite geometric sequence

(a(1-r^n))/1-n

17

What is the sum of an infinite geometric sequence

a/1-r

18

How to find nCr

n!/r!(n-r)!

19

What is the trapezium rule

h[y0 + yn + 2(y1 + ... + yn–1)]